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ojordan · Joined:Sun Dec 18, 2011 12:12 pm Posts:63

devnull73 wrote:

Looks like the r128 driver is stuck using fbdev, which kills performance.

That is not right. You should look into setting up your card correctly https://wiki.ubuntu.com/PowerPCFAQ

linuxopjemac · Joined:Fri Oct 08, 2010 3:45 pm Posts:2744

Sad to hear...

devnull73 · Joined:Wed Nov 30, 2011 1:17 pm Posts:16

ojordan wrote:

devnull73 wrote:

Looks like the r128 driver is stuck using fbdev, which kills performance.

That is not right. You should look into setting up your card correctly http://ubuntuforums.org/showpost.php?p= ... ostcount=1 .

Thanks for the useful link. Unfortunately I cant seem to get X to work unless its using the fb.

Tried a bunch of stuff on that page to no avail. As soon as I set useFBDev to False, I get a black screen.

thanks

theos911 · Joined:Sun Jun 19, 2011 8:07 pm Posts:408

Try adding

Code:

Option "NoAccel" "true"

To your xorg.conf

It goes in the top part that looks like:

Code:

Section "Device"
Identifier "Configured Video Device"
BusID   "PCI:0:16:0"
Driver  "ati"
#Option "UseFBDev" "true"
#Option "NoInt10"  "true"
#Option "DMAForXv" "true"
#Option "ForcePCIMode" "true"
#Option "NoAccel" "true"
#Option   "AGPMode"   "2"
Option "NoAccel" "true"
EndSection

Though, your options won't be commented out.

linuxopjemac · Joined:Fri Oct 08, 2010 3:45 pm Posts:2744

Good idea Theos. Take your inspiration from the second xorg.conf file here.

devnull73 · Joined:Wed Nov 30, 2011 1:17 pm Posts:16

No go Im afraid.

Just doesnt seem to be a way to get it working with fb.

devnull73 · Joined:Wed Nov 30, 2011 1:17 pm Posts:16

without I mean

Happy New Year btw everybody!

theos911 · Joined:Sun Jun 19, 2011 8:07 pm Posts:408

I have a Rage 128 in my B&W, which I just upgraded to a G4. I'll see what I can look into.

theos911 · Joined:Sun Jun 19, 2011 8:07 pm Posts:408

If nothing else, I can confirm your results. true works fine, false goes nowhere.

EDIT - Please provide the output of:

Code:

cat /etc/X11/xorg.conf

so I know what we are working with.

theos911 · Joined:Sun Jun 19, 2011 8:07 pm Posts:408

Alright, I have a solution.

Code:

Option "NoInt10" "true"

The top of the file for my working Rage 128 now looks like:

Code:

Section "Device"
Identifier "Configured Video Device"
BusID   "PCI:0:16:0"
Driver  "ati"
Option "UseFBDev" "false"
Option "NoInt10"  "true"
#Option "DMAForXv" "true"
#Option "ForcePCIMode" "true"
#Option "NoAccel" "true"
#Option   "AGPMode"   "2"
Option "NoAccel" "true"
EndSection

Why exactly do you want UseFBDev false anyway?

Quote:

You should specify the correct framebuffer with a yaboot parameter (e.g. video=aty128fb) or disable the openfirmware framebuffer. See section 3.7b above. If you are using 11.04 or 11.10 then you will have to load the aty128fb kernel module first (see section 3.7d below). You may still have to make changes to your monitor section (see below). An alternative "fix" for the framebuffer error can be done through the xorg.conf, although it has been commented that this solution is inferior (see thread http://ubuntuforums.org/showthread.php?t=1888881). The alternate fix is to set Option "UseFBDev" "False" and possibly also Option "NoInt10" "True" :

~Rsavage's Guide